Charmking Socks: Tested Circulation (15-20 mmHg)… Athlete’s Best Fit Running (3 Pairs) Compared We recently tested the Charmking Compression Socks (15-20 mmHg) for running and cycling, and the results were quite impressive. Designed for both men and women, these three-pair sets provide a balanced level of compression that doesn’t feel overly tight. The 15-20 mmHg range strikes the perfect balance between support and comfort, making them ideal for long runs or intense rides. The socks’ seamless design minimizes irritation, and the graduated compression helps improve blood flow, reducing fatigue. We noticed a subtle but noticeable difference in endurance, especially during extended periods. The fabric is breathable, but we did wish there were more color options. Overall, the Charmking socks deliver reliable support without sacrificing comfort, making them a solid choice for athletes seeking performance-enhancing compression.